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Chapter 1: Kernel Workspace Setup
Chapter 2: Building the 5.x Linux Kernel from Source - Part 1
Chapter 3: Building the 5.x Linux Kernel from Source - Part 2
Chapter 4: Writing Your First Kernel Module - LKMs Part 1
Chapter...

Cloning this book’s code repository

The complete source code for this book is freely available on GitHub at https://github.com/PacktPublishing/Linux-Kernel-Programming_2E. You can clone and work on it by cloning the git tree, like so:

git clone https://github.com/PacktPublishing/Linux-Kernel-Programming_2E

The source code is organized chapter-wise. Each chapter is represented as a directory – for example, ch1/ has the source code for this chapter. The root of the source tree has some code that is common to all chapters, such as the convenient.h and klib.c source files, among others.

For efficient code browsing, I would strongly recommend that you always index the code base(s) with ctags and/or cscope. For example, to set up the ctags index on a source tree, just cd to the root of the source tree and type ctags -R. (If you haven’t already, please invest the time in learning code browsing tools like cscope and ctags.)

Unless noted otherwise...

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Key benefits

Discover how to write Linux kernel and module code for real-world products
Implement industry-grade techniques in real-world scenarios for fast, efficient memory allocation and data synchronization
Understand and exploit kernel architecture, CPU scheduling, and kernel synchronization techniques

Description

The 2nd Edition of Linux Kernel Programming is an updated, comprehensive guide for new programmers to the Linux kernel. This book uses the recent 6.1 Long-Term Support (LTS) Linux kernel series, which will be maintained until Dec 2026, and also delves into its many new features. Further, the Civil Infrastructure Project has pledged to maintain and support this 6.1 Super LTS (SLTS) kernel right until August 2033, keeping this book valid for years to come! You’ll begin this exciting journey by learning how to build the kernel from source. In a step by step manner, you will then learn how to write your first kernel module by leveraging the kernel’s powerful Loadable Kernel Module (LKM) framework. With this foundation, you will delve into key kernel internals topics including Linux kernel architecture, memory management, and CPU (task) scheduling. You’ll finish with understanding the deep issues of concurrency, and gain insight into how they can be addressed with various synchronization/locking technologies (e.g., mutexes, spinlocks, atomic/refcount operators, rw-spinlocks and even lock-free technologies such as per-CPU and RCU). By the end of this book, you’ll have a much better understanding of the fundamentals of writing the Linux kernel and kernel module code that can straight away be used in real-world projects and products.

What you will learn

Configure and build the 6.1 LTS kernel from source Write high-quality modular kernel code (LKM framework) for 6.x kernels Explore modern Linux kernel architecture Get to grips with key internals details regarding memory management within the kernel Understand and work with various dynamic kernel memory alloc/dealloc APIs Discover key internals aspects regarding CPU scheduling within the kernel, including cgroups v2 Gain a deeper understanding of kernel concurrency issues Learn how to work with key kernel synchronization primitives

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Product Details

Publication date : Feb 29, 2024

Length 826 pages

Edition : 2nd Edition